Elbow connection.



S. A. HAWKINS.

ELBOW CONNECTION. APPLICATION FILED MAY 23, 1907.

Patented Sept. 15, 1908,

21 lided, five/2 2407? 4 4 2% N ,dkzzzzaifm z'zg NITED STATES PATENT oEEIcE.

sAMUEL A. HAWKINS, OF CHICAGO,- ILLINOIS, ASSIGNOR TO THE ECONOMIC ENGINEERING CONSTRUCTION- COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

E B'ow CONNECTION.

Specification of Letters Patent.

Patented Sept. 15, 1908.

Application filed May 23, 1907. Serial No. 375,224.

' of Illinois, have invented certain new and useful Improvements in, Elbow Connections, of which the following is a specification.

This invention relates to elbow pipe connections and relates particularly to elbow connections especially designed and adapted for use in conduits for conveying heavy objects at high velocities, as in the conduits of pneumatic ash conveyers of the general type renewed when worn out.

shown and described in U. S'Letters Patent No. 851,054, in which said elbow is subjected to much wear from the abrading action of clinkers and other heavy hard substances passing through the same. q

The object of the invention is to provide an elbow connection, the surface of which most exposed to wear consists of a refractory lining which may be quickly and conveniently To this end an elbow connection ofmy invention consists of the various features, combinations of features and details of construction hereinafter described and claimed.

In the accompanyin drawings, in which my invention is fully ilustrated .Figure 1 is a side view of an elbow pipe connection of 'my invention, in what I now consider its preferable form. Fig. 2 is a top plan view thereof as shown in Fig. 1. Fig. 3 is a sectional view on the line33 of Fig. 2. Fig. 4 is a sectional view on the line 44 of Fig. 1; and Fig. 5 is a sectional side view of a. modified form of elbow embodying rnyinvention.

My' improved elbow connection comprises a section l'designed and adapted to be connected injperinanent adjustment to the adjacentmenibers of-the conduit or pipe line,

' not showiig of which it forms a part, and a section 2 detachably secured to the section 1,

by means inde' endent of the means for connecting said elbow into the pipe lineor conduit. As shown, (said section 1 is-provided at its ends with usualflanges'3provided with bolt holes 4 adapted toreceivethe bolts for connecting said elbo "to the: adjacent members of the pipe orfconduitfandthe section 2 -is removabl connected to thesection 1 by 1 means of bo ts 5 which pass li si'litable.

holes or openings in lugs 6 one and 2. It is obvious that,

sections for ashes and the like, the inner surface of the section 2 will be exposed to the greatest wear and ,unless protected, will wear out long before other parts of said elbow connection or the straight sections of the pipe line or conduit. In order to render the section 2 more durable, it is made thicker than other parts of said elbow exposed to less wear. As shown, the extra thickness is provided by means of a lining 7 preferably made of very hard and refractory material, as White cast iron, and to provide for renewing the same quickly and at small cost, said lining is made separate from said section 2 and is adapted to be secured in position therein by means of screws 8, which pass through holes 9 in said section 2 and are threaded into suitable openings'in said lining 7, as shown nuts 10 are preferably cast into said lining 7 in proper positions. To insure that the threaded openings of the nuts 10 will be exposed to the openings 9 in the sec tions 2 of the elbow to provide for easily en gagin the screws 8 therewith, and to avoid nice ts and adjustments, the holes 9 are made somewhat larger than the threaded openings in the nuts 10 and are preferably somewhat elon ated in the direction of the length of the e bow, so that said openings form in effect slots. With this construction it is obvious, that the lining 7 of the elbow section 2 can be quickl and conveniently renewed or replaced with adjustment of the elbow section 1, by detach ing said section 2 from said section 1, removing the worn lining 7 and substitutinga new lining therefor. In this manner, it is obvious tion-can be'extended a most indefinitely, in a In order that the inner surface of the lining 7 may be practically continuous with thein- 'ner surface ofv the elbow proper, the elbow section 2 is provided with a suitable recess, shown at 11, ada ted to receive said'lining 7, the depth of sai recess being equal to the thickness of said lining. v

My improved elbow usually be made of and economy in manufacture, I prefer to cast the same in a single piece and to subsequently sever the section 2v from the section 1.- This ordinarily be done by weakening the casting along desired lines of severance, as by j -formin grooves 12 in the outersurfacfthereneum'at c conveyer pf, sai" *"weakening grooves also extending cast iron and for purposes of convenience.

out disturbing the that the .life of my im roved elbow connec very simple manner and at a very slight cost. 5-

. through the lugs 6. in the form of holes' l8 adapted to receive wedges or the like for sub- Lectmg the metal to the necessary strain for reaking the same.

It is found in practice that where metal is broken in this manner, it has a tendency to substantially concentric with the curve of the elbow, and in Fig. 5 of the drawings I have illustrated a'modification of this character, the sections of the elbow being indicated by 1 and 2 respectively, and the joint between them by 14. Other elements of said elbow are substantially identical with corresponding elements in the other figures and are indicated by the same reference numerals.

In the form of my improved elbow shown 7 in Fig. 5, the sections 1 and 2 thereoi'fwilifpreferably be cast separate from each other, owing to the liability of the line of cleavage diverging from the desired curve.

For purposes of convenient reference, the sections 1 and 1 are desi nated in the claims as main sectionsand t e sections 2 and 2 as wear sections.

I claim 1. An elbow connection comprising a main sectioh adapted-for connection to members of a pipe line or conduit, a separate wear section, a renewable lining therefor,and independent means for detachably securing said Wear section to said main section, whereby said wear section may be removed and replaced without disturbing the oonnections'of said main section to saidpipe line or conduit members.

2. I An elbow connection comprising a main section adapted for connection to members of a pipe line or conduit, a separate Wear sec tion, a renewable refractory lining therefor and independent means for detachably securing said wear section to said main section,

whereby said wear section may be removed and replaced without disturbing the connections of said main section to said pipe line or conduit members.

3. An elbow connection comprising a main section adapted, for connection to members of a pipe line or conduit, and a separate section provided with a recess adapted to receive a lining, a separate lining removably secured in said recess and independent means for detachably securing said wear section to said main section, wherebysaid wearsection may be removed and replaced without disturbing the connections of said main section to said pi e line or conduit members. 1

- section adapted for connection to members of a pipe line or conduit, a separate wear section, lugs on said sections provided with bolt said bolt holes whereby said wear section may be removed and replaced without dis- 1 turbing the connections of said main section to saidpipe line or conduit members, a separatelining for said wear'section and means for securing the same in position comprising screwswhi'ch extend through holes in said wear section and are threaded into said lin- An elbow connection comprising a main section adapted for connection to members of a pipe line of conduit, a separate wear section and independent means for detachably securing said wear section to said main sec tion, whereby said wear section may be reconnections of said main section to said pipe hne or conduit members, the omt between 4. An e bow connection comprising a main holes and securing bolts which pass through moved and replaced without disturbing the said sections extending substantially on straight lines.

In testimony, that I claim the foregoing as my invention, I aflix my signature in presence of two subscribing witnesses, this 16th day of May, A. D. 1907.

' i I SAMUEL A. HAWKINS.

Witnesses:

K. A. COSTELLO, M. WARD. 

